Correcting O-legs, do leggings need to be tied above the knee? What's the use?

As soon as I saw this question, I knew that you didn't do your homework on O-leg correction before asking this question, and you didn't understand the principle of O-leg formation and correction. O-shaped leg is mainly the bad angle formed by the thigh and calf bones at the knee position. This bad angle is mainly caused by the tension imbalance of medial and lateral ligaments of knee joint. Therefore, correcting the O-leg is mainly to change the ligaments inside and outside the knee joint. When you see this, you should understand how to tie it. If you still don't understand, give points and continue to answer.